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scenejs.html
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scenejs.html
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<!DOCTYPE html>
<html>
<head>
<title>SceneJS / cannon.js example</title>
<meta charset="utf-8">
<style>
* {margin:0;padding:0}
</style>
</head>
<body>
<script src="../libs/scenejs.js"></script>
<script src="../build/cannon.js"></script>
<canvas id="theCanvas" width="600" height="400"/>
<script>
var scene, quaternionNode, translationNode,
world, body, shape, timeStep=1/60;
initCannon();
initSceneJS();
animate();
function initCannon() {
world = new CANNON.World();
world.gravity.set(0,0,0);
shape = new CANNON.Box(new CANNON.Vec3(1,1,1));
body = new CANNON.Body({
mass: 1
});
body.addShape(shape);
body.angularVelocity.set(0,10,0);
body.angularDamping = 0.01;
world.addBody(body);
}
function initSceneJS() {
SceneJS.createScene({
id: "theScene",
canvasId: "theCanvas",
nodes: [
{
type: "lookAt",
eye : { x: 0.0, y: 10.0, z: 15 },
look : { y:1.0 },
up : { y: 1.0 },
nodes: [
{
type: "camera",
optics: {
type: "perspective",
fovy : 25.0,
aspect : 1.47,
near : 0.10,
far : 300.0
},
nodes: [
{
type: "renderer",
clearColor: { r: 1.0, g: 1.0, b: 1.0 },
clear: {
depth : true,
color : true
},
nodes: [
{
type: "light",
mode: "dir",
color: { r: 1.0, g: 1.0, b: 1.0 },
diffuse: true,
specular: true,
dir: { x: 1.0, y: -0.5, z: -1.0 }
},
{
type: "light",
mode: "dir",
color: { r: 1.0, g: 1.0, b: 0.8 },
diffuse: true,
specular: false,
dir: { x: 0.0, y: -0.5, z: -1.0 }
},
{
type: "translate",
id: "translate",
x : 0.0, y : 0.0, z : 0.0,
nodes: [
{
type: "quaternion",
id: "quaternion",
x : 1.0, y : 0.0, z : 0.0, angle : 0.0,
nodes: [
{
type: "material",
emit: 0,
baseColor: { r: 0.5, g: 0.5, b: 0.6 },
specularColor: { r: 0.9, g: 0.9, b: 0.9 },
specular: 1.0,
shine: 70.0,
nodes: [
{
type : "cube",
xSize: shape.halfExtents.x,
ySize: shape.halfExtents.y,
zSize: shape.halfExtents.z,
}
]
}
]
}
]
}
]
}
]
}
]
}
]
});
// Get handles to some nodes
scene = SceneJS.scene("theScene");
quaternionNode = scene.findNode("quaternion");
translationNode = scene.findNode("translate");
}
function animate() {
// Start the scene rendering
scene.start({
idleFunc: updatePhysics
});
}
function updatePhysics() {
var axisAndAngle, axis, angle;
// Step the physics world
world.step(timeStep);
// Copy position from cannon to SceneJS translation node
translationNode.set("xyz",body.position);
// Get orientation of the body from cannon.js
axisAndAngle = body.quaternion.toAxisAngle();
axis = axisAndAngle[0];
angle = axisAndAngle[1];
// Copy orientation to the SceneJS quaternion node
quaternionNode.set("rotation",{ x: axis.x, y: axis.y, z: axis.z, angle: angle*180 / Math.PI });
}
</script>
</body>
</html>